Fix includes of SkColorSpace

Required to land https://skia-review.googlesource.com/c/skia/+/526416

Change-Id: I7959b36c533f99334096a2bc467853a5aad92978
Bug: skia:13052
diff --git a/libs/hwui/apex/android_canvas.cpp b/libs/hwui/apex/android_canvas.cpp
index 2a939ef..905b123 100644
--- a/libs/hwui/apex/android_canvas.cpp
+++ b/libs/hwui/apex/android_canvas.cpp
@@ -23,7 +23,9 @@
 #include <utils/Color.h>
 
 #include <SkBitmap.h>
+#include <SkColorSpace.h>
 #include <SkSurface.h>
+#include <SkRefCnt.h>
 
 using namespace android;